Technical Tips, Tricks and Articles

Interview Questions (.NET)

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  1. What’s the difference of using System.Text.StringBuilder over System.String?
    Answer: System.String is immutable. System.StringBuilder was designed with the
    purpose of having a mutable string where a variety of operations can be performed.

  2. What’s the difference between the System.Array.CopyTo() and System.Array.Clone()?
    Answer:
    The Clone() method returns a new array (a shallow copy) object containing all the elements in the original array. The CopyTo() method copies the elements
    into another existing array. Both perform a shallow copy. A shallow copy means the contents (each array element) contains references to the same object as the elements in the original array. A deep copy (which neither of these methods performs) would create a new instance of each element’s object, resulting in a different, yet identical object.

  3. How can you sort the elements of the array in descending order?
    Answer:
    By calling Sort () and then Reverse () methods.
  4. What’s the .NET collection class that allows an element to be accessed using a unique key?
    Answer:
    Hashtable.

Written by ..alee

December 19, 2006 at 3:54 pm

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